// 打印类属性、方法定义
/**
 * 使用
 * main.ts 中注册
 * import Print from '@/plugins/print.js'
 * Vue.use(Print) // 注册
 * 代码中使用
 * this.$print(this.$refs.exportPdf);
 */
/* eslint-disable */

const Print = function (dom, options) {
  if (!(this instanceof Print)) return new Print(dom, options);

  this.options = this.extend(
    {
      noPrint: ".no-print"
    },
    options
  );

  if (typeof dom === "string") {
    this.dom = document.querySelector(dom);
  } else {
    this.isDOM(dom);

    this.dom = this.isDOM(dom) ? dom : dom.$el;
  }

  this.init();
};

Print.prototype = {
  init: function () {
    var content = this.getStyle() + this.getHtml();

    this.writeIframe(content);
  },

  extend: function (obj, obj2) {
    for (var k in obj2) {
      obj[k] = obj2[k];
    }

    return obj;
  },

  getStyle: function () {
    var str = "",
      styles = document.querySelectorAll("style,link,script");

    for (var i = 0; i < styles.length; i++) {
      str += styles[i].outerHTML;
    }

    str +=
      "<style>" +
      (this.options.noPrint ? this.options.noPrint : ".no-print") +
      "{display:none;}</style>";

    str +=
      "<style>html,body,div{height: auto!important;margin:0;padding:0}</style>";

    // str += "<style>html,body,div{height: auto!important;}</style>";

    return str;
  },

  getHtml: function () {
    var inputs = document.querySelectorAll("input");

    var textareas = document.querySelectorAll("textarea");

    var selects = document.querySelectorAll("select");

    var canvass = document.querySelectorAll("canvas");

    var isNeedRemove = document.querySelectorAll(".isNeedRemove");

    for (var k = 0; k < inputs.length; k++) {
      if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
        if (inputs[k].checked == true) {
          inputs[k].setAttribute("checked", "checked");
        } else {
          inputs[k].removeAttribute("checked");
        }
      } else if (inputs[k].type == "text") {
        inputs[k].setAttribute("value", inputs[k].value);
      } else {
        inputs[k].setAttribute("value", inputs[k].value);
      }
    }

    for (var k2 = 0; k2 < textareas.length; k2++) {
      if (textareas[k2].type == "textarea") {
        textareas[k2].innerHTML = textareas[k2].value;
      }
    }

    for (var k3 = 0; k3 < selects.length; k3++) {
      if (selects[k3].type == "select-one") {
        var child = selects[k3].children;

        for (var i in child) {
          if (child[i].tagName == "OPTION") {
            if (child[i].selected == true) {
              child[i].setAttribute("selected", "selected");
            } else {
              child[i].removeAttribute("selected");
            }
          }
        }
      }
    }

    //canvass echars图表转为图片

    for (var k4 = 0; k4 < canvass.length; k4++) {
      if (isNeedRemove.length == 0) {
        var imageURL = canvass[k4].toDataURL("image/png");

        var img = document.createElement("img");

        img.src = imageURL;

        img.setAttribute("style", "max-width: 100%;");

        img.className = "isNeedRemove";

        canvass[k4].style.display = "none";

        // canvass[k4].parentNode.style.width = '100%'

        // canvass[k4].parentNode.style.textAlign = 'center'

        canvass[k4].parentNode.insertBefore(
          img,
          canvass[k4].nextElementSibling
        );
      }
    }

    //做分页

    //

    // var pages = document.querySelectorAll('.result');

    // for (var k5 = 0; k5 < pages.length; k5++) {

    //   pages[k5].setAttribute('style', 'page-break-after: always');

    // }
    return this.dom.outerHTML;
  },

  writeIframe: function (content) {
    var w,
      doc,
      iframe = document.createElement("iframe"),
      f = document.body.appendChild(iframe);

    iframe.id = "myIframe";

    //iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";

    iframe.setAttribute(
      "style",
      "position:absolute;width:0;height:0;top:-10px;left:-10px;"
    );

    w = f.contentWindow || f.contentDocument;

    doc = f.contentDocument || f.contentWindow.document;

    doc.open();

    doc.write(content);

    doc.close();

    var _this = this;

    iframe.onload = function () {
      _this.toPrint(w);

      setTimeout(function () {
        document.body.removeChild(iframe);
      }, 100);
    };
  },

  toPrint: function (frameWindow) {
    try {
      setTimeout(function () {
        frameWindow.focus();
        try {
          if (!frameWindow.document.execCommand("print", false, null)) {
            frameWindow.print();
          }
        } catch (e) {
          frameWindow.print();
        }

        // frameWindow.close();
      }, 10);
    } catch (err) {
      // console.log("err", err);
    }
  },

  isDOM:
    typeof HTMLElement === "object"
      ? function (obj) {
        return obj instanceof HTMLElement;
      }
      : function (obj) {
        return (
          obj &&
          typeof obj === "object" &&
          obj.nodeType === 1 &&
          typeof obj.nodeName === "string"
        );
      }
};

const MyPlugin = {};

MyPlugin.install = function (Vue, options) {
  // 4. 添加实例方法

  Vue.prototype.$print = Print;
};

export default MyPlugin;
